| NGC 6193 | |
| Epoch: | J2000 |
| Class: | Open cluster |
| Dist Ly: | 3765.3 ly |
| Dist Pc: | 1155 pc |
| Appmag V: | 5.2 |
| Size V: | 15′ |
| Age: | 3 million years |
| Constellation: | Ara |
| Names: | C 1637-486, Cl VDBH 195, OCl 975, Dun 413, Cr 310, ESO 226-SC020, Lund 716, h 3642, GC 4225, Caldwell 82 |
NGC 6193 (also known as Caldwell 82) is open cluster containing 27 stars in the constellation Ara, visible to the unaided eye.[1] NGC 6193 lies at the center of the Ara OB1 association, which extends over a square degree. The cluster is associated with (and provides the energizing radiation for) neighboring regions of the nebulosity NGC 6188.
NGC 6193 is dominated by two O class multiple star systems within 10" of each other at the centre of the cluster, and a probable binary B0 giant. There are at least 20 other early B stars in the cluster, of 9th and 10th magnitude.
| Name | Spectral type | Comment | |||||
| 56 | 5.62 | O3−3.5 V + O5.5−6 V + O6.5−7 V | Triple system | ||||
| 55 | HD 150135 | 6.89 | O6.5V((f))z | Binary | |||
| 45 | HD 150041 | 7.06 | B0III | Variable | |||
| 37 | HD 149834 | 9.17 | B2V | Binary? | |||
| 59 | 10.32 | B4V | |||||
| CD-48 11077 | 10.42 | B2.5V | |||||
| 58 | CD-48 11075 | 10.05 | B2.5V | ||||
| 54 | CD-48 11071 | 8.45 | B1V | Binary | |||
| 53 | CD-48 11069 | 9.55 | B1V | ||||
| 40 | CD-48 11039 | 11.02 | B3V | ||||
| 42 | CD-48 11046 | 10.91 | B2.5V | ||||
| 43 | CD-48 11051 | 10.39 | B1h | ||||
| CD-48 11060 | 10.71 | B3V | |||||
| 47 | CD-48 11061 | 11.21 | B3.5V | binary | |||
| 50 | CD-48 11062 | 11.42 | B3.5V | ||||
| 52 | CD-48 11065 | 11.06 | B2.5V | Wrongly cross-referenced to HD 150136 in Herbst | |||
| 57 | CD-48 11076 | 10.10 | B2V | ||||
| 63 | CD-48 11082 | 10.38 | B2V | ||||
| 65 | CD-48 11086 | 10.38 | B2.5V | ||||
| 66 | CD-48 11088 | 10.05 | B2.5V | ||||
| 67 | CD-48 11090 | 10.59 | B2.5V |